Question

cos(43°) × cos(47°) – sin(43°) × sin(47°)

Answer 1

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-0.44807361612 is the answer

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Answer 2

Answer:

0

Step-by-step explanation:

cos(43°)×cos(90°-43) - sin(43°)×sin(90-43)

cos(43°) × sin(43°) - sin(43°)×cos (43°)

something minus samething

=0